US4075288AExpiredUtility

Vibration-damping material

Assignee: GOLE JEANPriority: Dec 20, 1973Filed: Dec 10, 1974Granted: Feb 21, 1978

Est. expiryDec 20, 1993(expired)· nominal 20-yr term from priority

Inventors:Bernard Jacques Graveron Alain Jacques Essel

C08L 9/00B32B 15/06B32B 25/16B32B 2319/00F16F 1/3605B32B 25/04Y10T428/31931B32B 2250/40B32B 2307/56Y10T428/31696B32B 7/12

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Claims

Abstract

Polyisoprenes having a minimum of 60% of 1,2- and 3,4-vinyl structure are useful as vibration-damping materials. The polyisoprenes are used individually or as a mixture with inorganic or organic fillers, or in the form of block copolymers.

Claims

exact text as granted — not AI-modified

What is claimed is: 
     
       1. A vibration-damping material which comprises polyisoprene in which the total percentage of 1,2- and 3,4-vinyl structure is 75% and the temperature maximum of tan δ at 110 Hz is in the range between 0° and 23° C, the polyisoprene is in the form of a block copolymer, wherein the block copolymer is of polybutyl methacrylate, polyisoprene and polybutyl methacrylate in the weight proportion 20-60-20.

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